#!/bin/bash

echo "# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释                                                                       " > /etc/apt/sources.list
echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse                    " >> /etc/apt/sources.list
echo "# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse              " >> /etc/apt/sources.list
echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse            " >> /etc/apt/sources.list
echo "# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse      " >> /etc/apt/sources.list
echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse          " >> /etc/apt/sources.list
echo "# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse    " >> /etc/apt/sources.list
echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse           " >> /etc/apt/sources.list
echo "# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse     " >> /etc/apt/sources.list
echo "                                                                                                               " >> /etc/apt/sources.list
echo "# 预发布软件源，不建议启用                                                                                                 " >> /etc/apt/sources.list
echo "# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse         " >> /etc/apt/sources.list
echo "# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse     " >> /etc/apt/sources.list